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Merces AADD, Ferreira RDS, Silva KJS, Salu BR, Maciel JDC, Aguiar JAO, Tashima AK, Oliva MLV, Carvalho Júnior LBD. Identification of blood plasma proteins using heparin-coated magnetic chitosan particles. Carbohydr Polym 2020; 247:116671. [PMID: 32829799 DOI: 10.1016/j.carbpol.2020.116671] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 06/17/2020] [Accepted: 06/18/2020] [Indexed: 10/24/2022]
Abstract
Heparin was immobilized on magnetic chitosan particles to be used as a tool for human plasma protein identification. Chitosan was magnetized by co-precipitation with Fe2+/Fe3+ (MAG-CH). Heparin was functionalized with carbodiimide and N-hydroxysuccinimide and covalently linked to MAG-CH (MAG-CH-hep). X-ray diffraction confirmed the presence of chitosan and Fe3O4 in MAG-CH. This particle exhibited superparamagnetism and size between 100-300 μm. Human plasma diluted with 10 mM phosphate buffer (pH 5.5) or 50 mM Tris-HCl buffer (pH 8.5) was incubated with MAG-CH-hep, and the proteins fixed were eluted with the same buffers containing increasing concentrations of NaCl. The proteins obtained were investigated by SDS-PAGE, LC/MS, and biological activity tests (PT, aPTT, and enzymatic chromogenic assay). Inhibitors of the serpin family, prothrombin, and human albumin were identified in this study. Therefore, MAG-CH-hep can be used to purify these proteins and presents the following advantages: low-cost synthesis, magnetic separation, ion-exchange purification, and reusability.
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Affiliation(s)
- Aurenice Arruda Dutra das Merces
- Laboratório de Imunopatologia Keizo Asami, Departamento de Bioquímica, Universidade Federal de Pernambuco, Recife, Pernambuco, 50670-901, Brazil
| | - Rodrigo da Silva Ferreira
- Departamento de Bioquímica, Universidade Federal de São Paulo, São Paulo, São Paulo, 04044-020, Brazil
| | - Karciano José Santos Silva
- Instituto Federal de Alagoas, Palmeiras dos Índios, Alagoas, 57608-180, Brazil; Centro de Ciências Exatas e da Natureza, Departamento de Física, Universidade Federal de Pernambuco, Recife, Pernambuco, 50670-901, Brazil
| | - Bruno Ramos Salu
- Departamento de Bioquímica, Universidade Federal de São Paulo, São Paulo, São Paulo, 04044-020, Brazil
| | | | - José Albino Oliveira Aguiar
- Centro de Ciências Exatas e da Natureza, Departamento de Física, Universidade Federal de Pernambuco, Recife, Pernambuco, 50670-901, Brazil
| | - Alexandre Keiji Tashima
- Departamento de Bioquímica, Universidade Federal de São Paulo, São Paulo, São Paulo, 04044-020, Brazil
| | - Maria Luiza Vilela Oliva
- Departamento de Bioquímica, Universidade Federal de São Paulo, São Paulo, São Paulo, 04044-020, Brazil
| | - Luiz Bezerra de Carvalho Júnior
- Laboratório de Imunopatologia Keizo Asami, Departamento de Bioquímica, Universidade Federal de Pernambuco, Recife, Pernambuco, 50670-901, Brazil.
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